diff --git a/tests/core/parameter_validation/string_parameter.yaml b/tests/core/parameter_validation/string_parameter.yaml
new file mode 100644
index 000000000..e88f5286e
--- /dev/null
+++ b/tests/core/parameter_validation/string_parameter.yaml
@@ -0,0 +1,9 @@
+description: A parameter with a string value
+values:
+  2015-01-01: string, without metadata
+  2016-01-01:
+    value: string, with metadata
+    metadata:
+      unit: string
+      period: year
+      reference: none provided
diff --git a/tests/core/parameter_validation/test_parameter_validation.py b/tests/core/parameter_validation/test_parameter_validation.py
index db4b74234..501f55861 100644
--- a/tests/core/parameter_validation/test_parameter_validation.py
+++ b/tests/core/parameter_validation/test_parameter_validation.py
@@ -23,43 +23,23 @@ def check_fails_with_message(file_name, keywords) -> None:
         raise
 
 
-@pytest.mark.parametrize(
-    "test",
-    [
-        (
-            "indentation",
-            {
-                "Invalid YAML",
-                "indentation.yaml",
-                "line 2",
-                "mapping values are not allowed",
-            },
-        ),
-        (
-            "wrong_date",
-            {
-                "Error parsing parameter file",
-                "Properties must be valid YYYY-MM-DD instants",
-            },
-        ),
-        ("wrong_scale", {"Unexpected property", "scale[1]", "treshold"}),
-        ("unexpected_key_in_parameter", {"Unexpected property", "unexpected_key"}),
-        ("wrong_type_in_parameter", {"must be of type object"}),
-        ("wrong_type_in_value_history", {"must be of type object"}),
-        ("unexpected_key_in_value_history", {"must be valid YYYY-MM-DD instants"}),
-        (
-            "unexpected_key_in_value_at_instant",
-            {"Unexpected property", "unexpected_key"},
-        ),
-        ("unexpected_key_in_scale", {"Unexpected property", "unexpected_key"}),
-        ("wrong_type_in_scale", {"must be of type object"}),
-        ("wrong_type_in_brackets", {"must be of type array"}),
-        ("wrong_type_in_bracket", {"must be of type object"}),
-        ("missing_value", {"missing", "value"}),
-        ("duplicate_key", {"duplicate"}),
-    ],
-)
-def test_parsing_errors(test) -> None:
+@pytest.mark.parametrize("test", [
+    ('indentation', {'Invalid YAML', 'indentation.yaml', 'line 2', 'mapping values are not allowed'}),
+    ("wrong_date", {"Error parsing parameter file", "Properties must be valid YYYY-MM-DD instants"}),
+    ('wrong_scale', {'Unexpected property', 'scale[1]', 'treshold'}),
+    ('unexpected_key_in_parameter', {'Unexpected property', 'unexpected_key'}),
+    ('wrong_type_in_parameter', {'must be of type object'}),
+    ('wrong_type_in_value_history', {'must be of type object'}),
+    ('unexpected_key_in_value_history', {'must be valid YYYY-MM-DD instants'}),
+    ('unexpected_key_in_value_at_instant', {'Unexpected property', 'unexpected_key'}),
+    ('unexpected_key_in_scale', {'Unexpected property', 'unexpected_key'}),
+    ('wrong_type_in_scale', {'must be of type object'}),
+    ('wrong_type_in_brackets', {'must be of type array'}),
+    ('wrong_type_in_bracket', {'must be of type object'}),
+    ('missing_value', {'missing', 'value'}),
+    ('duplicate_key', {'duplicate'}),
+    ])
+def test_parsing_errors(test):
     with pytest.raises(ParameterParsingError):
         check_fails_with_message(*test)
 
@@ -81,3 +61,10 @@ def test_yaml_hierarchy() -> None:
     parameters = ParameterNode("", directory_path=path)
     parameters_at_instant = parameters("2016-01-01")
     assert parameters_at_instant.node1.param == 1.0
+
+
+def test_string_parameter():
+    path = os.path.join(BASE_DIR, 'string_parameter.yaml')
+    parameter = load_parameter_file(path, 'string_parameter')
+    assert parameter("2015-01-01") == "string, without metadata"
+    assert parameter("2016-01-01") == "string, with metadata"